Minimally Invasive Root Canal Treatment With Active Disinfection on Single Rooted Teeth With Periapical Lesions

Root canals were irrigated with room temperature 5.25% sodium hypochlorite which was activated ultrasonically for 30 seconds and then intra-canal heated using a heat carrier to a temperature fixed at 150 degree celsius. Three consecutive cycles of PAU and intra-canal heating of sodium hypochlorite were performed. After the first and the last cycle, root canals were irrigated with 5 mL of 17% ethylenediaminetetraacetic acid (EDTA) and kept in the canal for 60 seconds and then flushed out with 5 mL of saline. Root canals of this group were kept un-instrumented.

Root canals were convetionally prepared using Reciproc Blue rotary files according to the manufacturer's instructions. Once the instrumentation was done, the canal was irrigated with 5 mL of 17% ethylenediaminetetraacetic acid (EDTA) kept for 60 seconds and then flushed with 5 mL of saline. NaOCl was placed in the canal and PUA followed by intracanal heating was performed three times as described for group 1 (IHAN).